require 'test/unit'
require 'yaml_help'

class YamlHelpTest < Test::Unit::TestCase
  def test_loads_help_files
    help = YamlHelp.new(nil, File.dirname(__FILE__))
    assert_equal 'bark', help[:dogs][:make_noise]["text"]
    assert_equal 'arf', help[:dogs][:sit]["text"]
    assert_equal 'meow', help[:cats][:make_noise]["text"]
  end
  
  def test_load_single_help_file
    help = YamlHelp.new('dogs', File.dirname(__FILE__))
    assert_equal 'bark', help[:dogs][:make_noise]["text"]
    assert_nil help[:cats]
  end
  
  def test_raises_io_error
    assert_raises(IOError){YamlHelp.new('dogs', 'invalid_dir')}
  end
end